1
2
3
4
5
6
7
8
9#include <linux/export.h>
10#include <linux/init.h>
11#include <linux/cpu.h>
12#include <linux/seq_file.h>
13#include <linux/debugfs.h>
14#include <asm/diag.h>
15#include <asm/trace/diag.h>
16#include <asm/sections.h>
17
18struct diag_stat {
19 unsigned int counter[NR_DIAG_STAT];
20};
21
22static DEFINE_PER_CPU(struct diag_stat, diag_stat);
23
24struct diag_desc {
25 int code;
26 char *name;
27};
28
29static const struct diag_desc diag_map[NR_DIAG_STAT] = {
30 [DIAG_STAT_X008] = { .code = 0x008, .name = "Console Function" },
31 [DIAG_STAT_X00C] = { .code = 0x00c, .name = "Pseudo Timer" },
32 [DIAG_STAT_X010] = { .code = 0x010, .name = "Release Pages" },
33 [DIAG_STAT_X014] = { .code = 0x014, .name = "Spool File Services" },
34 [DIAG_STAT_X044] = { .code = 0x044, .name = "Voluntary Timeslice End" },
35 [DIAG_STAT_X064] = { .code = 0x064, .name = "NSS Manipulation" },
36 [DIAG_STAT_X09C] = { .code = 0x09c, .name = "Relinquish Timeslice" },
37 [DIAG_STAT_X0DC] = { .code = 0x0dc, .name = "Appldata Control" },
38 [DIAG_STAT_X204] = { .code = 0x204, .name = "Logical-CPU Utilization" },
39 [DIAG_STAT_X210] = { .code = 0x210, .name = "Device Information" },
40 [DIAG_STAT_X224] = { .code = 0x224, .name = "EBCDIC-Name Table" },
41 [DIAG_STAT_X250] = { .code = 0x250, .name = "Block I/O" },
42 [DIAG_STAT_X258] = { .code = 0x258, .name = "Page-Reference Services" },
43 [DIAG_STAT_X26C] = { .code = 0x26c, .name = "Certain System Information" },
44 [DIAG_STAT_X288] = { .code = 0x288, .name = "Time Bomb" },
45 [DIAG_STAT_X2C4] = { .code = 0x2c4, .name = "FTP Services" },
46 [DIAG_STAT_X2FC] = { .code = 0x2fc, .name = "Guest Performance Data" },
47 [DIAG_STAT_X304] = { .code = 0x304, .name = "Partition-Resource Service" },
48 [DIAG_STAT_X308] = { .code = 0x308, .name = "List-Directed IPL" },
49 [DIAG_STAT_X318] = { .code = 0x318, .name = "CP Name and Version Codes" },
50 [DIAG_STAT_X500] = { .code = 0x500, .name = "Virtio Service" },
51};
52
53struct diag_ops __bootdata_preserved(diag_dma_ops);
54struct diag210 *__bootdata_preserved(__diag210_tmp_dma);
55
56static int show_diag_stat(struct seq_file *m, void *v)
57{
58 struct diag_stat *stat;
59 unsigned long n = (unsigned long) v - 1;
60 int cpu, prec, tmp;
61
62 get_online_cpus();
63 if (n == 0) {
64 seq_puts(m, " ");
65
66 for_each_online_cpu(cpu) {
67 prec = 10;
68 for (tmp = 10; cpu >= tmp; tmp *= 10)
69 prec--;
70 seq_printf(m, "%*s%d", prec, "CPU", cpu);
71 }
72 seq_putc(m, '\n');
73 } else if (n <= NR_DIAG_STAT) {
74 seq_printf(m, "diag %03x:", diag_map[n-1].code);
75 for_each_online_cpu(cpu) {
76 stat = &per_cpu(diag_stat, cpu);
77 seq_printf(m, " %10u", stat->counter[n-1]);
78 }
79 seq_printf(m, " %s\n", diag_map[n-1].name);
80 }
81 put_online_cpus();
82 return 0;
83}
84
85static void *show_diag_stat_start(struct seq_file *m, loff_t *pos)
86{
87 return *pos <= NR_DIAG_STAT ? (void *)((unsigned long) *pos + 1) : NULL;
88}
89
90static void *show_diag_stat_next(struct seq_file *m, void *v, loff_t *pos)
91{
92 ++*pos;
93 return show_diag_stat_start(m, pos);
94}
95
96static void show_diag_stat_stop(struct seq_file *m, void *v)
97{
98}
99
100static const struct seq_operations show_diag_stat_sops = {
101 .start = show_diag_stat_start,
102 .next = show_diag_stat_next,
103 .stop = show_diag_stat_stop,
104 .show = show_diag_stat,
105};
106
107DEFINE_SEQ_ATTRIBUTE(show_diag_stat);
108
109static int __init show_diag_stat_init(void)
110{
111 debugfs_create_file("diag_stat", 0400, NULL, NULL,
112 &show_diag_stat_fops);
113 return 0;
114}
115
116device_initcall(show_diag_stat_init);
117
118void diag_stat_inc(enum diag_stat_enum nr)
119{
120 this_cpu_inc(diag_stat.counter[nr]);
121 trace_s390_diagnose(diag_map[nr].code);
122}
123EXPORT_SYMBOL(diag_stat_inc);
124
125void notrace diag_stat_inc_norecursion(enum diag_stat_enum nr)
126{
127 this_cpu_inc(diag_stat.counter[nr]);
128 trace_s390_diagnose_norecursion(diag_map[nr].code);
129}
130EXPORT_SYMBOL(diag_stat_inc_norecursion);
131
132
133
134
135int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
136{
137 diag_stat_inc(DIAG_STAT_X014);
138 return diag_dma_ops.diag14(rx, ry1, subcode);
139}
140EXPORT_SYMBOL(diag14);
141
142static inline int __diag204(unsigned long *subcode, unsigned long size, void *addr)
143{
144 union register_pair rp = { .even = *subcode, .odd = size };
145
146 asm volatile(
147 " diag %[addr],%[rp],0x204\n"
148 "0: nopr %%r7\n"
149 EX_TABLE(0b,0b)
150 : [rp] "+&d" (rp.pair) : [addr] "d" (addr) : "memory");
151 *subcode = rp.even;
152 return rp.odd;
153}
154
155int diag204(unsigned long subcode, unsigned long size, void *addr)
156{
157 diag_stat_inc(DIAG_STAT_X204);
158 size = __diag204(&subcode, size, addr);
159 if (subcode)
160 return -1;
161 return size;
162}
163EXPORT_SYMBOL(diag204);
164
165
166
167
168int diag210(struct diag210 *addr)
169{
170 static DEFINE_SPINLOCK(diag210_lock);
171 unsigned long flags;
172 int ccode;
173
174 spin_lock_irqsave(&diag210_lock, flags);
175 *__diag210_tmp_dma = *addr;
176
177 diag_stat_inc(DIAG_STAT_X210);
178 ccode = diag_dma_ops.diag210(__diag210_tmp_dma);
179
180 *addr = *__diag210_tmp_dma;
181 spin_unlock_irqrestore(&diag210_lock, flags);
182
183 return ccode;
184}
185EXPORT_SYMBOL(diag210);
186
187int diag224(void *ptr)
188{
189 int rc = -EOPNOTSUPP;
190
191 diag_stat_inc(DIAG_STAT_X224);
192 asm volatile(
193 " diag %1,%2,0x224\n"
194 "0: lhi %0,0x0\n"
195 "1:\n"
196 EX_TABLE(0b,1b)
197 : "+d" (rc) :"d" (0), "d" (ptr) : "memory");
198 return rc;
199}
200EXPORT_SYMBOL(diag224);
201
202
203
204
205int diag26c(void *req, void *resp, enum diag26c_sc subcode)
206{
207 diag_stat_inc(DIAG_STAT_X26C);
208 return diag_dma_ops.diag26c(req, resp, subcode);
209}
210EXPORT_SYMBOL(diag26c);
211
